(19)

(11)

EP 1 392 943 A1

(12)

(43) Date of publication: 03.03.2004 Bulletin 2004/10 (21) Application number: 02726303.7 (22) Date of filing: 05.06.2002

(51) International Patent Classification (IPC)7: E05B 15/16 (86) International application number: PCT/GB2002/002311 (87) International publication number: WO 2002/099230 (12.12.2002 Gazette 2002/50)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 06.06.2001 GB 0113712 (71) Applicant: Qinetiq Limited London, SW1E 6PD (GB)	(72) Inventor: BROWN, Peter, Mark Farnborough GU14 0LX (GB) (74) Representative: Lowther, Deborah Jane et al QinetiQ LtdIP FormalitiesA4 BuildingIvely Road Farnborough, Hampshire GU14 0LX Farnborough, Hampshire GU14 0LX (GB)